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The precipitate was then heated in a stream of Cl2, converting it to 0.7125 g of AgCl. Calculate the % w/w NaNo3 in the sample.
How are the empirical and molecular formulas of a compound related? What is the empirical formula of compounds: ethyne (C2H2) and styrene (C8H8).
There are 14 standbys who hope to get seats on a flight, but only 6 seats are available on the plane. How many different ways can the 6 people be selected?
The string of the kite is taut and makes an angle of 60 degree with the horizontal. Approximate the height of the kite above level ground if 500 feet of string is payed out.
A radio tower has a 64-foot shadow cast by the sun. If the angle from the tip of the shadow to the top of the tower is 78.5 degrees, what is the height of the radio tower?
To determine the diameter of the sun, an astronomer might sight with a transit first to one edge of the sun and then to the other, estimating that the included angle equals 32'.
An airplane travels at 180 km/h for 5 hr in a direction of S48°E from Glenview Naval Air Station. At the end of this time, how far south of the Glenview Naval Air Station is the plane (to the ne
The angle of depression to the bottom of the pole is 14°, and the angle of elevation to the top of the pole is 18°. Find her distanse to the pole.
The first gear in a single-stage gear train has 42 teeth and an angular velocity of 3 revolutions per second. The second gear has 7 teeth.
A swimmer orients himself perpendicular to the parallel banks of a river. If the swimmer's velocity is 2m/s and the velocity of the current is 0.5m/s, what will be his resultant velocity?
The altitude h(in ft) of a jet that goes into a dive and then again turns upward is given by h(t)=16t^3-240t^2+10000. What is the altitude of the jet when it turns up out of the dive?
Construct a sinusoid equation with the given amplitude and period that goes through the given point. Amplitude 3, period pie (3.14), point (0,0).
One rope pulls a barge directly east with a force of 82 N and another rope pulls the barge directly north with a force of 57 N. Find the magnitude of the resultant force acting on the barge.
A child rides a horse on a merry-go-round 12 feet from the center. The merry-go-round rotates at 1/2 revolution per minute. Find the child's linear velocity in radians per minute.
If the aircraft maintains an average speed of 220 miles per hour and if the error in direction is discovered after 15 minutes, through what angle should the pilot turn to head toward Louisville?
Assuming that the period of the system is 1/2 second, determine a trigonometric model that gives the position of the weight at time t seconds.
The tips of the ski poles are stuck into the ground 17 cm apart and the handles meet 110 cm above the ground. What angle do the ski poles form where they touch? Draw a diagram of this problem.
A coast guard station received a distress call from a fishing boat 12 km away. How far is the rescue boat from the fishing boat?
Which has the greater grade resistance: a 2200-lb car on a 2 degree uphill grade or a 2000-1b car on a 2.2 degree uphill grade?
The distance along the ground form the airplane to the airport is 5 miles. What is the angle of depression from the airplane to the airport?
The angle of depression from the bird to the feet of an observer standing away fromt he lamppost is 35 deg. The horizontal distance from the bird to the observer is 25 meters. How tall is the l
As it leans against a building, an 8 meter ladder makes an angle of 62 deg with the ground. How far is the bottom of the ladder from the base of the building to the nearest tenth of a meter?
A man is walking along a straight road. If the height of the tower is h=40 m, then what is the distance in meters of the man from the tower?
A little boy is flying a kite. The string of the kite makes an angle of 30 deg with the ground. If the height of the kite is h=21 m, find the length in meters of the string that the boy has use
At the same time she measures the angle of depression of the landing spot to be 17 deg. How far away, to the nearest meter, is the landing spot from a point on the gorund vertically below the bal